Abstract: A modular antenna architecture includes a plurality of joined-together flat, laminate-configured antenna sub-panels, in which RF signal processing (RF amplifier) modules are embedded within a very lightweight, honeycomb-configured support member, upon which respective antenna sub-array and control, power and beam steering signal distribution networks are respectively mounted. The thickness of the honeycomb-configured support member-embedded is sized relative to the lengths of the RF signal processing modules such that input/output ports at opposite ends of the RF modules are substantially coplanar with conductor traces on the front and rear facesheets, so that the RF modules provide the functionality of RF feed-throughs to provide RF signal coupling connections between the rear and front facesheets of the antenna sub-panel.